Bring back the letter codes

Why were the letter codes for the boards (e.g. /a/, /b/, etc.) removed from the menu on the left hand side? These were helpful as a reminder what the letters stood for.  Otherwise it's hard to remember what the letter code links at the top and bottom of the pages on the right hand side (when you're actually reading a board) stand for.

Thanks for bringing them back.  But I think showing the directory codes, not hiding them, should be the default setting. A newb visiting 4chan for the first time needs the letter code reminders the most, while a long-time /b/-tard who probably knows all the board letters by heart can turn them off if she wants.